Hi and welcome to KnittingHelp! Your work on this lovely sweater is really beautiful. I think you've diagnosed the problem correctly. It looks like you knit the 10sts from the holders in the wrong direction on each side. You need to pick up the sts starting on the right front at the neck edge, cast on 48ssts and then knit the 10sts at the left front starting at the shoulder edge and knitting toward the neck edge. In other works, you'll begin at the right neck edge and end at the left neck edge. That way the hood edge will align with the neck and look like a shallow version of a hood which will be completed with the deep ribbing. You're almost there and since you've done so much work on the cables, I'd rip out and start the hood again. There are other fixes but this would be the cleanest.